helloworld plugin does nothing

pliz · 01-07-2010, 02:00 PM

Here is how to replicate:

1. Ubuntu 9.10
2. Install calibre by

Quote:

sudo python -c "import urllib2; exec urllib2.urlopen('http://status.calibre-ebook.com/linux_installer').read(); main()"

3. Download the zip file suggested in documentation

Quote:

http://calibre-ebook.com/downloads/h...rld_plugin.zip

4. Install it by:

Quote:

calibre-customize -a helloworld_plugin.zip

5. Open calibre, check the plugin is installed
6. Try converting an .fb2 book to epub
7. Open epub with view in specific format and check metadata

Publisher is unchanged from previous (NONE in my case)

What am I doing wrong? I'd like to scrap a plugin for postprocessing epubs after conversion to include fonts and necessary corrections. However, can't even start since the only examle python plugin I could find (helloworld) does not even work for me.

Suggestions are welcomed!

kovidgoyal · 01-07-2010, 02:11 PM

IIRC that plugin only works for LRF output. If you're looking for example plugins, the calibre source code is full of them. A lot of calibre functionality is implemented as plugins. There's no real difference between a builtin and a custom plugin.

pliz · 01-07-2010, 02:17 PM

1. The source code of that plugin explicitly says:
file_types = set(['epub', 'lrf']) # The file types that this plugin will be applied to

I do not see a reason why it would not work on epub. Is there one?

2. Can you point exactly to a file that is a FileTypePlugin in calibre source tree? The only one I found with grep is HTML2ZIP plugin, which is a part of
pluginize/src/calibre/customize/builtins.py

Where else to look?

Thank you!

kovidgoyal · 01-07-2010, 02:20 PM

The reason it only works for LRF is because the whole postprocess set of plugins only work for lrf (this is an oversight from the time when calibre's conversion susbsytem was refactored, I forgot to migrate the postprocess plugins).

If you want to write a postprocess plugin,I suggest waiting for the next release, when this will be rectified.

pliz · 01-07-2010, 02:22 PM

Thanks! Any estimate when is the next release?

kovidgoyal · 01-07-2010, 02:28 PM

calibre is released typically once every six days

pliz · 01-07-2010, 02:31 PM

Wow! Superimpressive! This means that Sunday I will be able to write that postprocessing plugin for epub.

Great!

Thanks!

kovidgoyal · 01-07-2010, 02:33 PM

No guarantees, a release has been known to take as long as 8 days on occasion

pliz · 01-11-2010, 03:56 AM

Thanks a lot! The new release 0.6.33 made the helloworld plugin work and my modification seems to be doing something also.

BTW, is it known where nook mounts its hard drive (the path relative to the root) internally? The one that is displayed as nook when inserted into a USB port of a linux machine? I could save some space by pointing to the fonts at a common location instead of zipping the fonts right into .epub

kovidgoyal · 01-11-2010, 12:15 PM

Dunno, I've never actually used a Nook, the driver in calibre was written using user supplied data.

pliz · 04-18-2010, 05:03 AM

Did the system break again in the latest versions? hello world plugin seems to not work again

kovidgoyal · 04-18-2010, 05:23 AM

Not that I am aware of. I used a 3rd party plugin just the other day. The only thing I can think of is to make sure your helloworld plugin has its name set.

04-18-2010, 05:23 AM	#12
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Not that I am aware of. I used a 3rd party plugin just the other day. The only thing I can think of is to make sure your helloworld plugin has its name set. Last edited by kovidgoyal; 04-18-2010 at 06:11 AM.

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01-07-2010, 02:11 PM	#2
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	IIRC that plugin only works for LRF output. If you're looking for example plugins, the calibre source code is full of them. A lot of calibre functionality is implemented as plugins. There's no real difference between a builtin and a custom plugin.

01-07-2010, 02:17 PM	#3
pliz Junior Member Posts: 6 Karma: 10 Join Date: Jan 2010 Device: nook	1. The source code of that plugin explicitly says: file_types = set(['epub', 'lrf']) # The file types that this plugin will be applied to I do not see a reason why it would not work on epub. Is there one? 2. Can you point exactly to a file that is a FileTypePlugin in calibre source tree? The only one I found with grep is HTML2ZIP plugin, which is a part of pluginize/src/calibre/customize/builtins.py Where else to look? Thank you!

01-07-2010, 02:20 PM	#4
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The reason it only works for LRF is because the whole postprocess set of plugins only work for lrf (this is an oversight from the time when calibre's conversion susbsytem was refactored, I forgot to migrate the postprocess plugins). If you want to write a postprocess plugin,I suggest waiting for the next release, when this will be rectified.

01-07-2010, 02:22 PM	#5
pliz Junior Member Posts: 6 Karma: 10 Join Date: Jan 2010 Device: nook	Thanks! Any estimate when is the next release?

01-07-2010, 02:28 PM	#6
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	calibre is released typically once every six days

01-07-2010, 02:31 PM	#7
pliz Junior Member Posts: 6 Karma: 10 Join Date: Jan 2010 Device: nook	Wow! Superimpressive! This means that Sunday I will be able to write that postprocessing plugin for epub. Great! Thanks!

01-07-2010, 02:33 PM	#8
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	No guarantees, a release has been known to take as long as 8 days on occasion

01-11-2010, 03:56 AM	#9
pliz Junior Member Posts: 6 Karma: 10 Join Date: Jan 2010 Device: nook	Thanks a lot! The new release 0.6.33 made the helloworld plugin work and my modification seems to be doing something also. BTW, is it known where nook mounts its hard drive (the path relative to the root) internally? The one that is displayed as nook when inserted into a USB port of a linux machine? I could save some space by pointing to the fonts at a common location instead of zipping the fonts right into .epub

01-11-2010, 12:15 PM	#10
kovidgoyal creator of calibre Posts: 44,550 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Dunno, I've never actually used a Nook, the driver in calibre was written using user supplied data.

04-18-2010, 05:03 AM	#11
pliz Junior Member Posts: 6 Karma: 10 Join Date: Jan 2010 Device: nook	Did the system break again in the latest versions? hello world plugin seems to not work again

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